15225213 has 16 divisors (see below), whose sum is σ = 21542400. Its totient is φ = 9537840.

The previous prime is 15225181. The next prime is 15225233. The reversal of 15225213 is 31252251.

It is not a de Polignac number, because 15225213 - 2⁵ = 15225181 is a prime.

It is a super-2 number, since 2×15225213² = 463614221790738, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15225213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15225233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6448 + ... + 8486.

It is an arithmetic number, because the mean of its divisors is an integer number (1346400).

Almost surely, 2^15225213 is an apocalyptic number.

It is an amenable number.

15225213 is a deficient number, since it is larger than the sum of its proper divisors (6317187).

15225213 is a wasteful number, since it uses less digits than its factorization.

15225213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2192.

The product of its digits is 600, while the sum is 21.

The square root of 15225213 is about 3901.9498971668. The cubic root of 15225213 is about 247.8493546168.

Adding to 15225213 its reverse (31252251), we get a palindrome (46477464).

The spelling of 15225213 in words is "fifteen million, two hundred twenty-five thousand, two hundred thirteen".